package server;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;

public class StaticResourceUtil {
    public static String getAbsolutePath(String path) {
        String absolutePath = StaticResourceUtil.class.getResource("/").getPath();
        return absolutePath.replaceAll("\\\\", "/") +path;
    }

    public static void outputStaticResource(InputStream inputStream, OutputStream outputStream) throws IOException {
        int count = 0;
        while(0 == count){
            count = inputStream.available();
        }

        int resourceSize = count;
        outputStream.write(HttpProtocolUtil.getHttpHeader200(resourceSize).getBytes(StandardCharsets.UTF_8));

        long written = 0;
        int byteSize = 1024;

        byte[] bytes = new byte[byteSize];
        while(written < resourceSize){
            if(written + byteSize > resourceSize){
                byteSize = (int) (resourceSize - written);
                bytes = new byte[byteSize];
            }

            inputStream.read(bytes);
            outputStream.write(bytes);

            outputStream.flush();
            written += byteSize;
        }
    }
}
